Just been helping my father in law with a 2000 Boxster S. Apparently compliant in ULEZ by providing the manufacturers Certificate of Conformity. However, what I found a nightmare is the Clowncil run CAZ areas across the country are not aligned, nor use the same web portals. Apparently it's compliant in Bath but not in Bristol. Same in other Cities. You would think the Clowncils would follow the same criteria, but no, just want to make it as awkward as possible so we are 'forced' to buy new vehicles. Like not being able to check an online system if you dipped into a CAZ or not by accident (hiding behind data protection BS!), not being able to set up an autopay to avoid a fine as I have just endured by dipping in by 20m in Sheffield following a Waze route with avoid tolls box checked whilst in my Euro 5 T6. Sorry, rant over!